The secret adversary

Tommy and Tuppence, two young people flat broke and out of work, are restless for excitement. They embark on a daring business scheme - Young Adventurers, Ltd. - 'Willing to do anything, go anywhere'. But their first assignment, for the shady Mr Whittington, draws them into a sinister political conspiracy, and under the eye of the elusive, ruthless Mr Brown, they find themselves plunged into more danger than they ever imagined ...